I use this build to farm the two bosses (Cobble Poundstone (Warrior) Flint Touchstone (Elementalist)) outside Sardelic Sanitarium In HM.
It is
"For Great Justice!"
Dragon Slash
Summon Ruby Djinn
Ebon Vanguard Assassin Support
Enraging Charge
Bonetti's Defense
Dolyak Signet
Healing Breeze
I have Sixteen in swordsmanship with a rune
9 Strength
9 Heal
3 Tactics
The summons are just to speed the process up.
It works but if you can suggest any improvements please share them.
Thanks
I never die unless i accidently aggro the grawl or other Stones
For the bosses, i use [Summon Ruby Djinn] plus [Ebon Vanguard Assassin Support] plus [Charm Animal] plus [Ursan Blessing]. I kill the boss in about 5 seconds IMO, anything that does lots of damage fast can farm those things, they are uber-weak bosses with no mobs to support them.